“Our advice to parents is to give children opportunity to talk when they want to, reassure them that they are safe, stick to usual routines and keep an eye on what they are watching on TV and social media so they aren’t exposed to frightening images from the attack.”

Dr Barrett stressed that it is a dedicated service for people who have been directly affected by the attack who are “experiencing high levels of distress”, but advised anyone struggling with a mental health issue to see their GP or call NHS 111.

“It’s really important to continue to look after your health and wellbeing after a traumatic incident, which means getting rest, eating well, returning to your routine, and staying connected with others,” he added.